What is SaaS? Software as a Service is a form of computing where you rent software from a service provider, rather than purchasing it yourself. Google Docs, QuickBooks, Salesforce and other CRM applications are all instances of SaaS. Rather than purchasing and installing software locally, the software is hosted and available over the Internet as a service. If interested, you should have no trouble finding Cloud Services NY. The end-user subscribes onto a monthly fee-based model.